🧠 KROrbit

📊 Ontology

📋 Logic

🔗 Semantic

🔍 Inference

🧠 Knowledge Representation

Logic • Ontologies • Semantic Web • Reasoning • Knowledge Graphs • AI

Master the art of representing knowledge — from logical formalisms and ontologies to semantic web technologies, knowledge graphs, and reasoning systems.

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Knowledge Representation Concepts & Technologies

Knowledge Representation Basics

Symbolic AI, knowledge engineering, representation.

Knowledge Acquisition

Extraction, elicitation, engineering.

Knowledge Systems

Expert systems, knowledge bases, inference engines.

Propositional Logic in KR

CNF, DNF, inference, resolution.

First-Order Logic

Predicates, quantifiers, unification.

Description Logic

ALC, SHOIN, SROIQ, OWL foundations.

Modal Logic in KR

Epistemic, temporal, Kripke semantics.

Nonmonotonic Logic

Default logic, circumscription, defeasible.

Semantic Web Basics

URI, RDF, graphs, linked data.

RDF (Resource Description Framework)

Triples, serializations, RDF schema.

RDFS

Classes, properties, sub-classes, sub-properties.

OWL (Web Ontology Language)

OWL Lite, DL, Full, ontology axioms.

SPARQL Query Language

Querying RDF, graph patterns, updates.

RDF Reasoning

Semantic entailment, inference, closure.

Ontology Engineering

Methodologies, tools, evaluation, reuse.

Upper Ontologies

SUMO, BFO, Cyc, foundational frameworks.

Domain Ontologies

FOAF, Dublin Core, SNOMED, gene ontology.

Ontology Matching

Alignment, mapping, integration.

Knowledge Graphs

Nodes, edges, properties, querying.

Graph Databases

Neo4j, GraphDB, Stardog.

Cypher Query Language

Pattern matching, graph queries.

Knowledge Graph Embeddings

TransE, Node2Vec, GCN, representations.

Rule-Based Systems

Production rules, forward/backward chaining.

Forward Chaining

Data-driven, inference engines, RETE.

Backward Chaining

Goal-driven, Prolog, resolution.

Description Logic Reasoning

Consistency, subsumption, Tableaux.

Pellet Reasoner

OWL reasoner, DL reasoning.

Knowledge Representation Languages

KIF, Common Logic, DAML, OIL.

Common Logic

Interlingua, ISO standard, semantics.

Information Extraction

NER, relation extraction, event extraction.

Named Entity Recognition

Entities, types, linking, disambiguation.

Relation Extraction

Distant supervision, bootstrapping.

Protégé Ontology Editor

Ontology editor, OWL support, reasoning.

Apache Jena

RDF, OWL, SPARQL, reasoning.

RDFLib

Python library for RDF, parsing, serialization.

Expert Systems

Rule-based, shells, MYCIN, XCON.

Question Answering

Knowledge-based QA, factoid, reasoning.

Intelligent Agents

BDI, knowledge, deliberation, planning.

Semantic Search

Meaning-based search, AI search.

Medical Informatics

SNOMED, clinical guidelines, decision support.

Contextual Reasoning

Context-aware KR, defaults, assumptions.

Causal Reasoning

Causality, counterfactuals, intervention.

Temporal Reasoning

Temporal logic, event calculus, time intervals.

Common Sense Reasoning

Cyc, ConceptNet, naive physics.

Uncertainty in KR

Fuzzy logic, probabilities, Dempster-Shafer.

KR Evaluation

Benchmarks, datasets, competition.

🧠 Knowledge Representation Mastery Roadmap

🔰 Foundation

KR basics, logic, expert systems, knowledge acquisition

📶 Core

Description logic, RDF/RDFS, OWL, SPARQL

🔥 Deep Dive

Ontologies, knowledge graphs, reasoning, rule systems

🏆 Frontier

Knowledge graph embeddings, causal reasoning, common sense

🧠 Model Knowledge — Master Knowledge Representation

Hands-on ontology building, reasoning challenges, and semantic web applications.

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